Despite widespread smoke free policies in California, rates of recent exposure to secondhand tobacco smoke, vape aerosol, and cannabis smoke among adults aged 1864 have been slowly increasing since 2020, with vape exposure E Cigs and Second Hand Vaping: Dangers and Protections The risks of first hand and second hand vaping Eoleaf Secondhand vape plumes could form lung damaging radicals American Chemical Society Don't Be Fooled, E cig Aerosol Is Not Harmless for Kids American Lung Association Exposure to secondhand aerosol from electronic cigarettes at homes: A real life study in four European countries ScienceDirect